Liturgical drama or religious drama, in its various Christian contexts, originates from the Mass itself, and usually presents a relatively complex ritual that includes theatrical elements. It was in Latin so many were not abler to understand the language, however the story was communicated through acting using gestures.
Medieval Theatre
Liturgical Drama II
The earliest known liturgical drama is the Easter trope, Whom do you Seek, which dates circa 925. Liturgical drama did not involve actors impersonating characters, but it did involve singing by two groups. - See more at: http://www.thefinertimes.com/Middle-Ages/theatre-in-the-middle-ages.html#sthash.t9XGgEQc.dpuf
Liturgical drama
Regularis Concordia
Second Shepherd's PlaySecular Participation in Liturgical Plays
Quem quaeritis?